kohen



(No Model.) 2 Sheets-Sheet 1. W. A. J. KOHRN.

vELECTRIC ENGINE.

No. 319,912. Patented June 9, 1885.

IN VENTOR ATTORNEYS.

N. PETERS. Phowuuw m mr, wmhinmu. D. C.

(No Model.) 2 SheetsSheet 2. W. A. J. KOHRN.

ELECTRIC ENGINE;

No. 319,912. Patented June 9, 1885.

WITNESSES: INVENTOR BY M W2, jm ATTORNEYS.

N. PETERS. F'holo-Lilhcgrapher, Wnhin mn, D. c.

UNITED STATES WILLIAM AMANDUS J. KCHRN, OF SEQ? FRANCISCO, CALIFORNIA.

ELECTf-HC ENGlNt...

SPECIFICATION forming part of Letters Patent No. 319,912, dated June 9, 1885.

Application filed February 6, 1884. (No modchl T0 at whom it may concern:

Be it known that I, WILLIAM AMANDUS J. KOHRN, of San Francisco, in the county of San Francisco and State of California, have invented a new and Improved Electric Engine, of which the following is a full, clear, and exact description.

The object of my invention is to provide a new and improved electric engine which is simple in construction, and by means of which very great motive power can be obtained from a given quantity of electricity.

The invention consists in the peculiar construction and arrangement of parts,as hereinafter fully described, and pointed out in the claims.

Reference is to be had to the accompanying drawings,forming part of this specification,in which similar letters of reference indicate corresponding parts in all the figures.

Figure 1 is a plan view of a compound electric engine of my improved construction. Fig. 2 is a side view of the same. Fig. 3 is an end view of the same, and Fig. i is a detail seetional view.

On a base, A, standards B are held adjoining each other, which standards are united by cross-bars C C, from which the magnets DJ), D and D of the field-magnets project, the magnets D D projecting from opposite sides of the bar C, and the magnets D D from the opposite sides of the bar C. The coils of each magnet D D D D are provided with plates E on the ends of their cores. To the outer surface of each end plate, E, on the end of the core, a brass block, F, is secured at the lower end,from the upper edge of which brass block an arm, G, is inclined upward and outward. The armature-plates H are provided at their inner edges with pivots,which are journaled in standards formed on the inner ends of the blocks F,so that the armature-plates can swing from and toward the end plates, E, on the cores, the center of the are on which the free edges of the plates swing being formed along the upper'inner edge of the blocks F. When the armatnres ll swing outward, they rest on the arms G of the blocks F, as shown at the left-hand side of Fig. 2; but the lower edges of the armatures .never come out cf contact with the heads or plates E on the cores. The

armature-plates H of each magnet are united by a core, 0, having a coil, J, forming an electric magnet, the polarity of which is opposite that of the corresponding magnet. The core 0 of the magnet J is secured to the plates H by screws, as shown in Fig. 4c, the heads d being put on before the core is secured to the plates. The armatures H are connected by connecting rods K with crossbars L, which in turn are connected by connectingrods M with sliding blocks N, to which the conncctingrods O are pivoted, which act on the cranks P of the driving-shaft 1, provided with a flywheel, Q, the shaft being suitably journaled on the base A. If the engine is constructed with two magnets, each having a par of coils, the shaft 1 has but a single crank; but when constructed as a compound engine, as shown in the drawings, with four magnets, each having twopairs of coils, the shaft 1 will have two cranks, each connected by a connecting-rod, O, with a sliding block, N.

Referring to Fig. 1, a is a battery for exciting the field-magnets, and b is a battery for exciting the armatures. On the shaft P an cccentric disk, It, is mounted, which reciprocates a rod, S, provided with two circuit-closing disks, T and U, which are mounted on the rod S and insulated from the same. The rod S is also provided with a prong, \V, which is located between two contact-strips, d and d, connected with the cores of the magnets, and the said rod S is also connected with the battery a. The magnets are connected by a wire, f, with the battery (6. Near the circuitclosing disk U two contact-strips, g, are held on opposite sides of the rod S, of which strips one is connected with the battery b, and the other with the armature-coils J of the ma nets D and D AClJOlIllUg the c1rcu1t elosing disk T two eontactstrips, h, are held opposite each other, of which one is connected with the battery I), and the other with the armature coils J of the magnets D and D.

The operation is as follows: Referring to Fig. 1, if the shalt P is revolved, the rod S will be moved in the direction of the arrow at, and the circuit-closing disk U will come in contact with the contact-strips and will close the circuit. The circuit will then be from the battery Z) through the strips 9, the circuit-closing disk U, the wire s, to the coil J on the armature of the magnet D, the wire m, to the coil J of the armature of the magnet D, and from the said coil J to the wire 19, and back to the battery I); the armatures of the magnets D and D will be excited, the said armatures being located at diametrically-opposite corners of the machine. At the same time that the disk U comes in contact with the strips 9 the prong or tooth WV on the rod S will be brought in contact with the right-hand contact-strip d, which is connected with the magnet D the magnet D being connected with the magnet D, and the said magnet D being connected by the wire f with the battery a, with which the rod S is connected. The circuit will then be as follows: from the battery through the rod S, the prong or tooth W, the contact-strip d, the coils of magnet D, the coils of magnet D, and the wiref, back to the battery. The cores of the magnets D and D and the corresponding armatures will be charged with magnetism of opposite polarity, and the armatures will be attracted by the v cores, and by means of the connecting-rods previously described the sliding blocks N will be moved in such a manner as to revolve the shaft P half around, and thereby the rod Sis moved in the inverse direction of the arrow a, and the contact-disk U is moved from the contact-strips g, and the contact-disk T is brought in contact with the contact-strips 7L, and at the same time the prong or tooth W will be moved from the strip (1 and brought in contact with the strip d. The circuit will then be as follows: from the battery I), through the wire 0, to the armature-coil J of the magnet D; from the said coil J, through the wire a, to the armature-coil J of the magnet D through the wire V, to the battery I). The armature coils J J of the magnets D and D will thus be excited. The circuit of the magnets will be as follows; from the battery a, through the rod S, the prong IV, the contact strip (1, the coils of magnet D, the coils of magnet D, and through the wire f, back to the battery. The cores of the magnets D and D and the armatures of the said magnets will be charged with magnetism of opposite polarity, and the armatures will be attracted by the said cores, and thereby the shaft will again be turned half a revolution, and so on. The diagonally-opposite pairs of magnets always work together. A single-acting machine provided with only one pair of magnets operates in a similar manner, the magnets operating alternately, whereas in the compound machine two pairs of magnets operate alternately. In my improved engine the armatures are in permanent contact with the fieldmagnetsthat is, they swing toward and from the cores of the magnets; but at one point they are always in contact, and that is at the lower edge, on which they swing. I am thus enabled to obtain much more power from the battery than I could obtain if the armatures were removed entirely from the cores on the end plates, as great power is required to tear off the armatures, and as this power would have to be furnished by the machine too much power would be lost or wasted.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In an electric engine, the combination, with field-magnets, of swinging armatures having coils wound thereon and an electric battery connected with the field-magnets, another battery connected with the coils of the armatures, and devices for automatically closing and opening the circuits of the fieldunagnets and of the armatures, substantially as herein shown and described.

2. In an electric engine, the combination, with field-magnets, of swinging armatures, between which eleetro magnets are held, an electric battery connected with the field-mag nets, another battery connected with the magnets on the armatures, and devices for automatically and alternately closing the circuits of the field-magnets and the corresponding armaturemagnets, so that one field magnet and the corresponding armature-magnets will be excited at the same time, substantially as herein shown and described.

3. In an electromagnetic engine, the combination of two magnets arranged on opposite sides of a supporting-bar, a swinging armature for each magnet, a coil for each armature, a crank-shaft, and intermediate mechanism for connecting said crank-shaft with the swing ing armature, substantially as shown and de scribed.

4.. In an electric engine, the combination, with field-magnets and with armatures having cores wound thereon, of a shaft, means for revolving the shaft from the armatures, a rod reciprocated from an eccentric or analogous device on the shaft, which rod is adapted to close and break the circuits of the field-magnets, and the electro-magnets of the armatures, substantially as herein shown and described.

5. In an electric engine, the combination, with field-magnets and arm atures having coils wound thereon, of the shaft P, adapted to be operated by suitable devices on the armatures, the rod S, reciprocated by the shaft P, the prong WV 011 the rod S, and the contactstrips dand (1, connected with the field-magnets, substantially as herein shown and described.

6. In an electric engine, the combination, with field magnets, of swinging armatures carrying coils, the shaft I, means for revolving the said shaft from the armatures, the rod S, reciprocated by the shaft I, the prong V7, the contact-strips d d, connected with the field magnets, the battery a, connected with the rod S,the circuitclosin g disks UT, andthe contactstrips h h and g g, connected with the battery and with the opposite magnets on the armatures, substantially as herein shown and described.

7. In an electric engine, the combination, with the field-magnets D D D D, of swinging IIO armatures for each magnet, electro-Inagnets J, held between the armatures, the shaft P, means for revolving the shaft from the armatures, the rod S, reciprocated by the shaft P, the prong W, projecting from the shaft S, the contactstrips d (2, connected with the field-magnets, the battery a, connected with the rod S, the contact-disks T U on the rod S, and the contact-stripsh and 9, connected with the battery I) and with the electro-magnets on the armatures, substantially as herein shown and described. 

